Table 1.

Estimated probability of surviving 1 day and expectation of life for Anopheles gambiae sensu lato collected from indoor residual spraying and control communities

Parameter	IRS communities	Control communities
Mean parity (%)	44.6a (n = 2334)b	71.7a (n = 3226)b
Probability of vectors surviving through 1 day (p) assuming 2 days of gonotrophic cycle (%)	66.9	84.7
Probability of vectors surviving through the sporogonic cycle assuming 10 days (p10) (%)	0.03	3.6
Average expectation of life	1.2 days	3 days

Results for Z-test of proportion for parity indoor residual spraying (IRS) versus control. Pooled sample proportion: 0.6035, P-value: < 0.001, Z-test statistic: − 20.35

^aDifferences in mean parity significant at 0.05 significance level

^bn refers to the number of Anopheles gambiae sensu lato dissected